We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Four green 288-pin DDR4 LRDIMM modules with black chips

OWC

OWC 512GB (4x128GB) DDR4 2666MHz CL19 4Rx4 ECC LRDIMM 1.2V 288-pin server RAM

SKU CH-9FBR-PSAWK

512 GB DDR4 2666 MHz ECC load-reduced quad-rank server kit with 1.2 V operation and 2133 / 2400 MHz backward compatibility

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Memory rank4Rx4

Capacity 512GB (4 x 128GB)

  • ECC load-reduced design protects data integrity in servers
  • 512 GB total capacity across four 128 GB modules
  • DDR4 2666 MHz CL19 at 1.2 V for efficient throughput
  • Backward compatible with 2133 MHz and 2400 MHz systems
  • JEDEC and RoHS compliant for warranty-safe upgrades

512 GB DDR4 LRDIMM kit for servers

This kit supplies 512 GB of DDR4 2666 MHz ECC load-reduced memory across four 128 GB modules. It targets administrators upgrading workstations, servers or NAS systems that require registered LRDIMM architecture. The modules operate at 1.2 V with a CL19 latency and conform to the PC4-21300 standard. They are not suitable for standard desktop platforms.

Compatibility checklist before ordering

Verify that your platform accepts 288-pin DDR4 LRDIMM modules with 4Rx4 organisation and ECC load-reduced buffering. The system must support DDR4 2666, 2400 or 2133 MHz speeds and 1.2 V operation. Do not mix these modules with unbuffered or standard registered DIMMs. Confirm the motherboard or server manual lists LRDIMM support and the required population rules for quad-rank parts.

Upgrading from lower-capacity DDR4 LRDIMMs

The jump makes sense when current memory limits virtual-machine density, database caching or large-dataset processing. Replacing smaller LRDIMMs with these 128 GB modules maximises slot utilisation on boards with limited DIMM sockets. The upgrade is worth it when the workload demands the full 512 GB kit and the platform qualifies the 4Rx4 load-reduced design.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $2,586.99
Pricier than about 90% of the 6,523 comparable items (median $188.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 91% of the 6,064 comparable items (median 32 GB).
Price per GB $5.05 per GB
Cheaper than about 73% of the 6,064 comparable items (median $7.25 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number2L6D44R4512S
Total capacity512 GB (4 × 128 GB)
Product type288-Pin DDR4 ECC LRDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeLoad Reduced
Memory rank4Rx4
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

Questions about this item

What does the 512GB kit contain and is anything else required to install it?

The kit includes four 128GB DDR4 2666MHz CL19 4Rx4 ECC LRDIMM modules. No extra parts are needed for installation in a compatible server or workstation.

Why choose the 512GB (4x128GB) version over a smaller capacity?

This 512GB kit provides maximum density with four 128GB LRDIMMs, ideal for virtualization or large datasets where a lower total capacity would limit workloads.

What does the 2666MHz speed mean once the memory is running in a server?

The modules run at 2666MHz (PC4-21300) with CL19 latency and will also operate at 2400MHz or 2133MHz if the platform requires a lower speed.

More in ECC Server RAM

Similar items